Arc Fault Detection

Arc fault protection is a relatively new technique employed for the fast clearance of arcing faults on BUS bars & within metal clad switchgear & associated cable boxes. The arc is detected using an optical sensor & the signal input to a protection device which also monitors the load current on the system. A trip signal can be achieved in less than 10ms using arc detection only or within 15ms when using the integrated instantaneous overcurrent check. This is considerably faster than a traditional IDMT overcurrent relay & provides additional protection from the onset of arcing faults with relatively low fault currents.
1S20 Monitor Relay

  • Compact, economic design
  • Simple panel mounting for retrofit applications
  • One, two or three independent arc sensor inputs
  • Two high speed tripping duty arc sense output contacts
 

  • Push button reset
  • Integrated self supervision
  • Fail alarm contact
  • 20-60V DC & 36-150V DC versions
  • 1S30 arc fault sensor with 1 or 2 optical detectors
  • Made in Australia

1S23 Monitor Relay

  • Compact, simple, rugged and economic design
  • Simple wiring and DIN rail mounting
  • Interface for one or two 1S30 arc fault sensors
  • High speed arc fault tripping output to interface with protection relay status inputs
  • Apply to initiate IEC61850 GOOSE messaging of arc fault events
 

  • Continuous arc fault sensor supervision
  • Arc fault pick up and supervision healthy indication
  • 24, 32, 48, 110, 125, 220, 240 and 250V DC auxiliary versions
  • 1S30 arc fault sensor with 1 or 2 optical detectors
  • Made in Australia

1S25 Monitor Relay

  • Four independent arc fault tripping zones
  • 1 or 2 arc fault sensors per zone allowing up to 8 arc fault sensors per 1S25 module
  • Trip indication LED for each arc fault monitoring zone
  • Non volatile memory ensures last recorded alarm states are restored on power up
  • Five high speed arc fault tripping duty output contacts (Set for latching or self reset)
 

  • Zone segregated or common tripping output configuration
  • Continuous arc sensor supervision with sensor fail LED for each zone
  • Wide range status input to block arc fault monitoring
  • Front panel reset button & status input
  • Self supervision watchdog with healthy LED & alarm contact
  • Built in test sequence
  • Wide range auxiliary supply
  • Made in Australia

1S26 Monitor Relay

  • Four independent arc fault tripping zones
  • 1 or 2 arc fault sensors per zone allowing up to 8 arc fault sensors per 1S26 module
  • Blocking status input for each arc fault zone
  • Trip indication LED for each arc fault zone
  • Continuous arc sensor supervision with sensor fail LED for each zone
  • Non volatile memory ensures last recorded alarm states are restored on power up
  • Integrated 3 phase overcurrent check function
 

  • 20-200% current setting range
  • Optional 5-50% E/F input
  • 1A or 5A nominal CT inputs
  • Integrated CB check function
  • 3 phase current check block status input
  • Thirteen (13) high speed configurable tripping duty output contacts
  • Zone segregated or common tripping output configuration
  • Reset LED flags via front panel button or status input
  • Self supervision watchdog with healthy LED & alarm contact
  • Made in Australia

1S30 Monitor Sensors

  • Compact rugged design
  • One or two optical detectors
  • High speed arc detection
  • Heavy duty 6m termination cable
  • Optional 20m & screened cables
  • Integrated sensor circuit supervision
  • Simple flush panel mounting outside or inside switchgear compartment
 

  • Compatible with all the above relays
  • Very low sensitivity to ambient light levels to avoid nuisance tripping even in direct sunlight
  • Sealed module for harsh environments
  • Optional metal reinforced mounting shield